Small optimizations on iggen buffer handling #317
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Check-perf-impact results: (c8fb992b35322012b54e351345fdf71a) ✔️ No significant performance change in the microbenchmark set. You are good to go! Relative execution time per category: (mean of relative medians)
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Pull Request Test Coverage Report for Build 12787152826Details
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psalz
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This also avoids an unordered_map by transposing the perform_task_buffer_accesses loop.
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perform_task_buffer_accessesupdates last-writers twice to gracefully handle overlapping writes, which is an edge case. This PR quickly checks if overlapping writes are present, and sticks to a single update if there are not. By transposing the loop nest fromchunk -> bidtobid -> chunk, we can also save avoid constructing anotherunordered_map.Results are not looking too impressive in the benchmark report, but I do get a consistent 4% speedup for RSim
room_small, which is scheduler bound on gpuc3.